98 ls1 oil sending unit

[SloGrn]

ordered a 98 oil sending unit from hawksthirdgen and the threads are like way too small. I broke the old one and through it away awhile ago so I cant remember what it looked like. I have a 98 ls1


http://www.hawksthirdgenparts.com/pr...ensor-New.html

that's the one I ordered and the part number matches.

[c0ncEpT]

You probably have a newer block then. 99+ look the same the thread diameter is just larger.

[1BADAIR]

You probably have a newer block then. 99+ look the same the thread diameter is just larger.

Threads are on the valley cover

[c0ncEpT]

Threads are on the valley cover

You sure? I didn't think they put the sensor in the valley cover until they moved the knock sensors to the side of the block.

f4b0a4d9.jpg

[SloGrn]

I have 806 heads and even my head bolts are for a 98 block. It definitely doesn't bolt into the valve cover

[hoogiesngrinderz]

Can't say I've heard of a block change late in the 98 model run, but it wouldn't be the first time there was a mid-year change.

[SloGrn]

Is there any indicators on it being a 98 or 99 block? And aren't the connectors different between the two oil sending units,

[hoogiesngrinderz]

You can check to production date. The thread size for the oil pressure sensor is usually the giveaway.

Yes, the 98 and 99+ temp sensors are different, but the 98 sensor will thread into 862/317/243/etc. Whose to say that someone didn't put the 806 heads on a 99+ shortblock though?

[1BADAIR]

You sure? I didn't think they put the sensor in the valley cover until they moved the knock sensors to the side of the block.

[ATTACH=CONFIG]54434[/ATTACH]

maybe!!
i just remember having to mill my valley cover cause the later ones are tall

[SloGrn]

So if the sensors are different how did they plug in a 99 sensor on a 98 PCM?

[hoogiesngrinderz]

Oil pressure sensor has the exact same connector across all the years, it's just the threads that are different.

I put a 2003 LQ4 into my 98. Only had to change the temp sensor. Everything else plugged in.